package day03;

public class IfDemo {
    public static void main(String[] args) {
        double price = 600.0;
        if(price >= 500){
            price *= 0.8;
        }
        System.out.println(price);
        System.out.println("===========");

        double score = 666;
        if(score < 0 || score > 100){
            System.out.println("error");
        }
        System.out.println("============");

    }

}
